This page is from a former STEVENS Bikes model year (2018). These pages are meant as a service in case you have questions about equipment and geometry of older STEVENS bikes. You can pick other model years at Service – Product Years.

Sonora GX

Vikt	10,7 kg
Storlekar	27,5" - 16" \| 29" - 18", 20", 22"
Ram	Carbon SL HMF
Färg(er)	Carbon Petrol-Blue

Pricing

recomm. retail price: 61 990.00 Kč

The easy way to your first marathon.

Due to Sram's Eagle 1x12-speed drivetrain STEVENS entry-level marathon machine weighs in at only 10.7kg (23.6lbs). From the top-notch carbon frame to the reliable specs including Shimano disc brakes, RockShox fork with tapered steerer and thru-axle to the oxygen Scorpo finishing kit, the Sonora has no flaws.

Carbon hardtail with first-class handling
High-quality frame details: internal cable routing, pressfit bottom bracket ...
Responsive RockShox Gold RL Air suspension fork w/ lockout remote control
New Sram GX Eagle 1x12-speed drivetrain plus Shimano's new BR-M6000 disc brakes
DT Swiss wheels with boost axle standard (16" version: 27.5")

Technology

Boost-Standard fork

What is right for the rear wheel is even more important at the front wheel - because steering precision matters.

Boost-Standard am Hinterbau

Seit dem Modelljahr 2016 entsprechen die Hinterbauten aller STEVENS-Fullys dem neuen „Boost“.

Double Chamber Technology

An inner reinforcement rib separates frame tubes and fork legs into two chambers.

High-Modulus Carbon Fibres

For incredibly light frames and utmost stiffness.

Versatile cable routing

To ride your bike like you want to: Versatile cable routing.

Di2-ready

Vorbereitete Rahmen für elegante Integration von elektronischer Schaltung.

Tapered Steerer / Tapered Headtube

Riders benefit from noticeably higher steering precision, almost without weight penalty.

QR15-Steckachse vorn

Die funktionellste Methode, das Vorderrad in der (Feder-)Gabel zu verankern.

Boost-Standard Fork

What is right for the rear wheel is even more important at the front wheel - because steering precision matters. This is why STEVENS uses suspension forks and hubs with extra wide axle spacing for all its 29er fullies, the Whaka+ ES and the trail rocket Sonora SL. These 110mm of axle spacing are called "Boost" or "Plus" and stand for lots of added lateral stiffness plus space for extra wide studded tires.

Boost-Standard am Hinterbau

Seit dem Modelljahr 2016 entsprechen die Hinterbauten aller STEVENS-Fullys dem neuen „Boost“- oder „Plus“-Achsmaß mit 148 mm Einbaubreite – und das hat gute Gründe: Die Seitensteifigkeit des Hinterrades erhöht sich um ca. 20%, wovon vor allem die großen 29er-Laufräder profitieren. Und es wird Platz geschaffen für voluminöse Stollenreifen, die auf dem Trail mit besserer Performance und mehr Fahrspaß punkten.

Double Chamber Technology

In order to better handle the applied loads, frame main tubes and fork legs are devided into two chambers by an inner reinforcement rib. Riders of the top road bike model Ventoux and carbon MTB hardtail Sonora will benefit from this feature.

High Modulus Carbon Fibers

Only the very best materials are used for the highest quality STEVENS carbon frames - so called high modulus carbon fibres. They offer a perfect combination of maximum toughness and elasticity. This way they provide maximum lateral stiffness for best forward drive and a high amount of comfort. Result: incredibly light and enormously stiff frames.

Versatile cable routing

We keep the cable routing on our bikes as versatile as possible so you can ride your bike like you want to. There are wide and therefore easy to reach cable ports in the frame to insert either one or two cables or none at all - there are cover plugs for any of these configurations. This is also very convenient for retrofitting a dropper post.

Di2-ready

Elektronische Schaltungen haben sich am Rennrad und am Mountainbike neben den klassischen mechanischen Schaltungen längst etabliert. Bestechend schnelle und zuverlässige Gangwechsel bei minimalem Wartungsaufwand machen sich eben nicht nur bei der Tour de France oder im Cyclocross-Worldcup oder auf den Cross Country-Weltcup-Strecken bezahlt. Und genau darum sind viele Rennrad- und Mountainbikerahmen von STEVENS bereits „Di2-ready“ – sprich: für die nahtlose Integration von Akkus und Kabeln (anstelle der herkömmlichen Seilzüge) vorbereitet. Und selbst für seine edle Alfine-Nabenschaltung bietet Shimano eine Elektronik-Version an.

Tapered Steerer / Tapered Headtube

Fork shaft (or steerer tube) and head tube are tapered, meaning their diameter increases from top to bottom resulting in a conical shape. The diameter needs to be bigger at the bottom since this is where higher stress is applied - especially when the bike has a higher total weight due to luggage or an e-drive and battery. Also tapered steerers feature a smoother force transfer (like forces caused by hard braking) to the downtube than forks with a continuous 1 1/8" diameter.

QR15-Steckachse vorn

Die „15“ steht für den Achsdurchmesser, das „QR“ für „Quick Release“, also Schnellspanner – und zusammen für die funktionellste Methode, das Vorderrad in der (Feder-)Gabel zu verankern. Die Vorteile sind bestechend: hohe Steifigkeit, präzise Bremsscheiben-Positionierung und kinderleichte Bedienung. Also stattet STEVENS fast alle Mountainbikes und sogar die hochwertigsten Trekking-, Crossbikes und Pedelecs damit aus. Vor allem bei den 29“-MTBs wird sogar noch die Einbaubreite erhöht – von 100 auf 110 mm, das ist noch steifer.

Utrustning

einfach
erweitert

Ramset

Ram

Carbon SL HMF

Double Chamber Technology
Axle: QR12x148
Brake: postmount disc 160
BB: Pressfit 92
Front derailleur mount: direct mount (high)
Cable routing: intern

Framgaffel

RockShox Recon Gold RL Air

Travel: 100 mm
Air suspension
Remote Lockout
Tapered Steerer 1 1/8" - 1 1/2"
Axle: QR15x110
Brake: postmount disc 6"

Headset

STEVENS Race Taper 1 1/8"-1 1/2"

Upper bearing cup: IS42/28.6
Lower bearing cup: IS52/40

Bromsar

Shimano BR-M6000

Hydraulic disc brake
Rotor: SM-RT56
Rotor size: 180/160 mm
IS / 6-bolt

Drivlina

Vevparti

Sram GX Eagle B

34 T
BB type: Press Fit MTB 89/92 mm / 24 mm
Boost chain line

Framväxel: -

Bakväxel

Sram GX Eagle

12-speed
Type-3 Roller Bearing Clutch™
Cage Lock™
Total capacity: 39 T

Kedja: Sram GX Eagle

Kassett

Sram XG 1275 Eagle

12-speed
Combination: 10-12-14-16-18-21-24-28-32-36-42-50 T

Hjul

Systemhjul: DT Swiss Mountain Classic

Däck

Schwalbe Rocket Ron Performance

Tire size: 57-584 | 622
Foldable
Addix compound

Cockpit

Styre

Oxygen Scorpo

Width: 700 mm
Backsweep: 7°
Rise: 11 mm
Clamp: 31.8 mm

Styrstam

Oxygen Scorpo MTB

Handlebar clamp: 31.8 mm
Angle: 6°

Sadel: Oxygen Roccia

Sadelstolpe

Oxygen Scorpo MTB

Length: 380 mm
Diameter: 27.2 mm
Insertion depth min. 100 mm

Växelreglage: Sram GX Eagle Trigger

Bromshandtag

Shimano BL-M6000

2 finger

Data

Vikt: 10,7 kg

Storlekar: 27,5" - 16" | 29" - 18", 20", 22"

Färg(er): Carbon Petrol-Blue

Laden weight

115 kg

Bike incl. rider, clothing and luggage

Testrapporter

Kompromissloses Race-Hardtail

03/2018

Stevens Sonora GX ist ein schnelles kompromissloses Race-Hardtail auf Basis eines leichten Carbonrahmens. Bei der Ausstattung eine gut ausgewählte Mischung aus günstigen und funktionell einwandfreien Teilen, wobei die Sram Eagle den Bike-Charakter prägt.

Geometri

schematische Skizze eines Fahrrades mit eingezeichneten Geometrie-Messpunkten

Ramhöjd (")		16	18	20	Mätinställning
Wheelsize (")		27.5	29	29
Seattube length	A1	605	627	642	nominal
Seattube length	A2	376	427	478	bottom bracket to top of seattube
Seattube length	A3	341	388	440	bottom bracket to top of top tube
Top tube length	B	584	584	598
Top tube horizontal	C	595	600	620	center headtube to center seatpost/seattube
Headtube angle (°)	D	69	70	70
Seattube angle (°)	E	74.5	74.5	74.5
Wheelbase	F	1106	1108	1123
Chainstay length	G	425	435	435
Headtube length	H	95	95	110
Bottom bracket drop	I	53	70	70	distance of bottom bracket to hub level
Bottom bracket height	K	301	301	301	distance to ground
Fork rake	L	44	43	43
Slope	M	254	227	193	top tube level distance front to rear
Wheel radius	N	354	371	371	incl. tires
Standover height	O	714	755	787	top of top tube to ground*
Fork build height	P	490	490	490	incl. lower headset cups
Front wheel - bottom bracket	Q	686	676	697
Reach	R	433	432	448	center bottom bracket to center headtube, horizontal
Stack	S	583	605	619	center bottom bracket to center headtube, vertical
Stack/Reach (1:x)		1.35	1.4	1.38	ratio stack to reach
Seatpost diameter		27.2	27.2	27.2
Stem length		60	75	90	center-center
Stem angle (°)		6	6	6
Handlebar diameter		31.8	31.8	31.8
Assembled spacers		8.3 + 5 + 5 + 5 + 5
Handlebar width		760	760	760
Cranklength		170	175	175
		16	18	20

* measured 1/3 from seattube and 2/3 from headtube

Bike-Category 5

Cross-country, marathon and touring mountain bikes

This category describes STEVENS cross-country, marathon and touring mountain bikes and is typically represented by STEVENS mountain bike hardtails and full suspension STEVENS bikes with short suspension travel. STEVENS MTB Marathon 120, Carbon XC, Alloy XC.

Instructions on intended use

The permissible overall weight (rider incl. baggage and bicycle) should not exceed 115 kg. Under certain circumstances the permissible maximum weight can be further limited by the component manufacturers’ recommendations for use.

The following weight limits for the rider including equipment and STEVENS bicycle apply to special wheels:

Mavic:	100 kg
DT Swiss:	110 kg

STEVENS cross-country, marathon and touring mountain bikes are suitable for off-road use, but not for blocked terrain, tricks, stair riding etc., training and competitive use in the categories freeride, dirt, downhill. STEVENS bikes of this category can be used on surfaces permitted for bikes of the categories 1 and 3 and are in addition suitable for rough and unpaved terrains. Sporadic jumps are also included in the field of use of these STEVENS bikes. But particularly inexperienced riders doing jumps may land inappropriately, thus increasing the acting forces significantly which may result in damage and injuries. We recommend that you train your skills in a riding technique course. If necessary, ask your STEVENS dealer to inspect your STEVENS bicycle at shorter intervals than according to the service and maintenance schedule.

For full suspension STEVENS mountain bikes trailers are not permitted.

Due to their design and fittings, STEVENS mountain bikes of the category 5 are not always suitable for being used on public roads. If you want to use them on public roads, these bikes must be fitted with the prescribed equipment. Observe the traffic rules when riding on public roads. For more information see chapter “Legal Requirements for Riding on Public Roads” in your comprehensive STEVENS user manual on the enclosed CD-ROM

Danger:

STEVENS bicycles of the category 5 are not suitable for use on blocked terrain, jumps, slides, stair riding, stoppies, wheelies, tricks etc.!

The mountain bike itself describing one particular type of bike does not exist any longer. Various types of mountain bikes for specific uses have been developed instead. Be sure to use your STEVENS mountain bike only according to its intended use. Observe the traffic rules when riding on public roads.

Sonora GX

Recommended Frame Size

Pricing

The easy way to your first marathon.

Technology

Boost-Standard fork

Boost-Standard am Hinterbau

Double Chamber Technology

High-Modulus Carbon Fibres

Versatile cable routing

Di2-ready

Tapered Steerer / Tapered Headtube

QR15-Steckachse vorn

Boost-Standard Fork

Boost-Standard am Hinterbau

Double Chamber Technology

High Modulus Carbon Fibers

Versatile cable routing

Di2-ready

Tapered Steerer / Tapered Headtube

QR15-Steckachse vorn

Utrustning

Ramset

Drivlina

Hjul

Cockpit

Data

Testrapporter

Kompromissloses Race-Hardtail

Geometri